Breech-operating mechanism.



PATENTED DEC. 15, 1903.

H. G. JAKOBSSON. BREEGH OPERATING MECHANISM.

APPLICATION FILED DEO.18, 1902.

H0 MODEL.

191 tneaaea UNITED STATES Patented December 15. 1903.

PATENT OEEicE.

HERMAN G. JAKOBSSON, OF BETHLEHEM, PENNSYLVAJN IA, ASSI GNOR TO BETHLEHEM STEEL COMPANY, OF SOUTH BETHLEHEM, PENNSYL- VANIA, A CORPORATION OF PENNSYLVANIA.

BREECH-OPERATSNG MECHANISM.

SPECIFICATION forming part of Letters Patent No. 746,706, dated December 15.

la e

A plication filed December 18, 1902. Serial No. 135.755. (No model.)

1'0 all whom it may concern:

Be it known that I, HERMAN G. JAKoBssoN, a subject of the King of Sweden and Norway, residing at Bethlehem, in the county of Northampton and State of Pennsylvania, have invent-ed certain new and useful Improvements in Breech-Operating Mechanism, of which the following is a specification.

My invention relates to that class of guns in which a dropping breech-block and an operating rock-shaft are employed in connection with a handle, which is normally locked to the gun in firing; and my invention consists in the novel construction fully set forth hereinafter and illustrated in the accompanying drawings, in which- Figure 1 is a side view, in part section, of the breech mechanism of a gun embodying my improvements, and Fig. 2 a side view of the shaft-actuating pawl and cam detached.

The barrel A of the gun is arranged to slide upon or in its cradle or other support and has a vertical opening in the breech end within which slides the breech-block B, and a shaft 2, turning .in bearings below the barrel, is provided with arms 3, which engage proper bearing-faces of the block, so that the block moves vertically when the shaft 2 is rocked and so that the rocking of the shaft will impart vertical movement in either direction to the block.

To an arm :0 on the shaft 2 is connected at one end a spring 5, secured at the other end to a fixed point on the gun, so that the descent of the block will be resisted by the spring, which therefore tends to counterbalance and elevate the block. This spring may be of any suitable character and arranged in any suitable manner. The shaft 2 is provided with a hand-lever F of any suitable charactcr, but preferably of the construction set forth in the application of )Ie'igs and Jakobsson, filed June 16, 1902, SerialNo. 111,956. As in the construction set forth in said application, Serial No. 111,956, there is upon the shaft 2 a cam 60, a shoulder of which on ti. -counter recoil of the gun engages a pawl 1, swinging on a fixed pivot, so as thereby to rock the shaft 2 in the direction of its arrow and automatically depress the breech-block and open the breech, the said pawl falling into position by gravity only.

To render the operation of the parts more certain, I connect a spring 30 to an car 31 on the pawl to carry it positively into contact with the cam at all times, and at the side of the gun I place a stud 33, having an inclined lower face adapted to engage the inclined face of an arm 32 of the pawl when the point of the latter is against the shoulder of the cam to turn the cam and depress the breechblock as the gun is returned to position, the slipping of the pawl from the shoulder of the cam being thus prevented.

Without limiting myself to the precise construction shown, I claim- 1.The combination with the sliding gun and vertically-movable breech-block and its cooperating rock-shaft and spring for rocking the shaft, of a cam on said shaft, a pawl pivoted to a non-sliding part of the structure, and a stud on the gun arranged to insure the cooperation of the pawl and cam, substantially as set forth.

2. The combination with the sliding gun and vertically-movable breech-block and its cooperating rock-shaft and spring for rocking the shaft, of a cam on said shaft, a pawl pivoted to a non-sliding part of the structure, and a be'el-faced stud on the gun arranged to engage the pawl and insure the cooperation of the pawlandcam. substantially as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing. witnesses.

HERMAN G. JAKOBSSON.

\Vitnesses:

EDWIN A. MILLER, E. B. HOFFMANN. 

